0.4.21

• Deprecated #[project], #[project_ref], and #[project_replace] attributes due to some unfixable limitations.

  Consider naming the projected type by passing an argument with the same name as the method to the #[pin_project] attribute instead.

  use pin_project::pin_project;
  use std::pin::Pin;
  
  #[pin_project(project = EnumProj)]
  enum Enum<T> {
      Variant(#[pin] T),
  }
  
  fn func<T>(x: Pin<&mut Enum<T>>) {
      match x.project() {
          EnumProj::Variant(y) => {
              let _: Pin<&mut T> = y;
          }
      }
  }

  See #225 for more details.

• Support Self in fields and generics in type definitions.

• Fix errors involving "self value is a keyword only available in methods with self parameter" in apparently correct code.

• Diagnostic improvements.